Dynamic Solutions

HSPF / Hydrological Simulation Program Fortran

HSPF (Hydrological Simulation Program-FORTRAN) is a comprehensive package for simulation of watershed hydrology and water quality for both conventional and toxic organic pollutants.  It can simulate for extended periods of time the hydrologic, and associated water quality, processes on pervious and impervious land surfaces and in streams and well-mixed impoundments.  HSPF is generally used to assess the effects of land-use change, reservoir operations, point or nonpoint source treatment alternatives, flow diversions, etc.

HSPF uses continuous rainfall and other meteorologic records to compute streamflow hydrographs and pollutographs.  HSPF simulates interception soil moisture, surface runoff, interflow, base flow, snowpack depth and water content, snowmelt, evapotranspiration, ground-water recharge, dissolved oxygen, biochemical oxygen demand(BOD), temperature, pesticides, conservatives, fecal coliforms, sediment detachment and transport, sediment routing by particle size, channel routing, reservoir routing, constituent routing, pH, ammonia, nitrite-nitrate, organic nitrogen, orthophosphate, organic phosphorus, phytoplankton, and zooplankton.  Program can simulate one or many pervious or impervious unit areas discharging to one or many river reaches or reservoirs.  Frequency-duration analysis can be done for any time series. Any time step from 1 minute to 1 day that divides equally into 1 day can be used. Any period from a few minutes to hundreds of years may be simulated.


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Learn about our HSPF training course